| unlimited(adjective, big, large, grand, huge) |
| ambitious(adjective, hard, tough, severe, difficult) |
| at large extent(expression, adjective, idiom, big, large) |
| backbreaker(adjective, hard, tough, severe, difficult) |
| biggest(adjective, big, large, grand, huge) |
| bothersome(adjective, hard, tough, severe, difficult) |
| burdensome(adjective, hard, tough, severe, difficult) |
| challenging(adjective, hard, tough, severe, difficult) |
| crucial(adjective, hard, tough, severe, difficult) |
| demanding(adjective, hard, tough, severe, difficult) |
| difficile(adjective, hard, tough, severe, difficult) |
| doomed passenger liner(expression, adjective, idiom, big, large) |
| easier said than done(adjective, hard, tough, severe, difficult) |
| effortful(adjective, hard, tough, severe, difficult) |
| exacting(adjective, hard, tough, severe, difficult) |
| exaggerated(adjective, big, large, grand, huge) |
| extra-large(adjective, big, large, grand, huge) |
| extravagant(adjective, big, large, grand, huge) |
| galling(adjective, hard, tough, severe, difficult) |
| grueling(adjective, bad, hard, tough, difficult) |